require("nvim-tree").setup({
        sort_by = sort_by_natural,
    })

    local SORT_METHODS = {
      sort_by_natural,
      "case_sensitive",
      "modification_time",
      "extension",
    }
...
    require("nvim-tree").setup({
        sort_by = sort_by,
    })

    local sort_by_name = true
    local function sort_by_natural(nodes)
      local function sorter(left, right)
        if left.type ~= "directory" and right.type == "directory" then
          return false
        elseif left.type == "directory" and right.type ~= "directory" then
          return true
        end
        left = left.name:lower()
        right = right.name:lower()
        if left == right then
          return false
        end
        for i = 1, math.max(string.len(left), string.len(right)), 1 do
          local l = string.sub(left, i, -1)
          local r = string.sub(right, i, -1)
          if
              type(tonumber(string.sub(l, 1, 1))) == "number"
              and type(tonumber(string.sub(r, 1, 1))) == "number"
          then
            local l_number = tonumber(string.match(l, "^[0-9]+"))
            local r_number = tonumber(string.match(r, "^[0-9]+"))
            if l_number ~= r_number then
              return l_number < r_number
            end
          elseif string.sub(l, 1, 1) ~= string.sub(r, 1, 1) then
            return l < r
          end
        end
      end
      if sort_by_name then
        table.sort(nodes, sorter)
      else
        return "modification_time"
      end
    end
    local cycle_sort = function()
      sort_by_name = not sort_by_name
      api.tree.reload()
      if sort_by_name then
        vim.notify("Sorting by name")
      else
        vim.notify("Sorting by modification time")
      end
    end
---
vim.keymap.set('n', 'T', cycle_sort, opts('Cycle Sort'))
require("nvim-tree").setup({
     sort_by = sort_by_natural,
...
})